Glossary of Terms

Understand basic Public Safety definitions and terms.

PVC

Definition:

Private Virtual Circuit. A connection that is permanently established between two or more nodes in the frame relay and
asynchronous transfer mode (ATM) based networks. It enables the creation of a logical connection on top of a physical
connection between nodes that communicate frequently or continuously.

Hand-off

The process by which the Mobile Telephone Switching Office (MTSO) passes a cellular phone conversation from one radio frequency in one cell to...

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ECMC Log Record

A log record that is generated by a network element in the IEN Voice product that has been modified by a component or subcomponent of the ECMC. Done...

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Zone Default

The Zone Default number is like an MSC (Mobile Switching Center) default for GSM (Global System for Mobile Communication). Because there are...

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Foreign Data

Spatial data provided electronically to the Data Collection team by a PSAP or other 9‐1‐1 agency. This information is used in the creation and...

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